| PAY BACK PERIOD: |
|
Number of sunny days /year |
= 300 days |
|
Average sunny days /month |
= 25 days |
|
Sun hours /day in summer |
= 8 |
|
Sun hours /day in winter |
= 6 |
|
Average sun hours /day |
= 7 |
|
Units generated /day for 10kw
solar array |
= 70 units |
|
Average cost /unit of utility |
= Rs.16 /unit (the cost /unit
is likely to be raised to Rs.20 /unit in the near
future) |
|
Cost saved /month |
= Rs.28,000 /month |
|
Cost saved /year |
= Rs.336,000 /year |
|
Estimated cost for 10kw of
solar system |
= Rs. 1.7 million |
|
Payback Period |
= 5 years |
Based on the above analogy monthly output and saving for
various sizes of solar array are estimated as under:
| Sr. No. | Size of Solar Array | Month output based on 7 hours sunshine @100% utilization factor | Saving/month @Rs.16/unit | Saving/year | Payback Period |
| 1 | 2000 watts | 350 units | Rs.5,600 | Rs.67,00 | 6-7 Yrs |
| 2. | 4000 watts | 700 units | Rs.11,200 | Rs.134,400 | 6-7 Yrs |
| 3. | 600 watts | 1050 units | Rs.16,800 | Rs. 201,600 | 5 1/2 - 6 Yrs |
| 4 | 8000 watts | 1400 units | Rs.22,400 | Rs. 336,000 | 5 1/2- 6 Yrs |
| 5 | 10000 watts | 1750 units | Rs.28,000 | Rs. 336,000 | 5 - 5 1/2 Yrs |
| 6 | 15000 watts | 2625 units | Rs.42,000 | Rs. 504,000 | 5 - 5 1/2 Yrs |
Your total investment on solar system project is paid back in
5-6 years which is reasonably a high rate of return in addition
to following:
| VALUE ADDITIONS: |
|
|
Value of your property with solar generation system
is enhanced with an equivalent amount. |
|
|
Solar system has a minimum life of 25 years against
payback period of 5-6 years. For the remaining period of
20 years, customers will get energy free of charge from
the God gifted sun except for minor maintenance charges
of the system. |
|
|
No carbon dioxide omission will keep the world clean and green. |
|
|
God has gifted Pakistan with plenty of solar energy. We should therefore focus on using this clean power to secure our future. |
|
|
In the future, utilities in Pakistan may also purchase excess power from the consumers having solar system to meet their shortfall by installing import/export meters at consumer premises and give rebate in their running bills for the units supplied to utility, thus such consumers are likely to enjoy electricity at a reduced cost for rest of their life as the net units consumed will be differential of import and export units. |
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